Renx  clavel



Patented Mar. 1, 1932 RENE CLAVEL, OF'BASEL, SWITZERLAND Y LOADING SILK CONTAINING FABRICS No Drawing. Application filed. April 18, 1928, Serial No. 271,100, and in Germany November 19, 1927.

The present invention relates to a process for loading fabrics of material or artificial silk, or mixed fabrics with metallic compounds.

' 5 According to the present invent on-a metallic compound adapted to give rise to the loading material on the fabric, such as for example stannic chloride, is applied to the fabric in admixture with thickener such as w gum arabic, dextrin, starch, degradation products of starch sugar or the like, in the form of a paste. such paste may be applied on one or both sides of the fabric and so as to cover all or part of the surface; for ex- 35 ample, pattern effects may be produced by printing. The fabric thus printed is then further treated in one or more successive baths containing if desired further loading agents, but particularly those substances g rsuch as alkali phosphates necessary for the conversion of the metallic compounds, into insolublebodies, so as to complete the load- It is advisable to add to the printing paste acids or salts having an acid reaction and if necessary protective colloids also such as size, albumen and the like; Instead of this addition of the acid reacting substances, the fabric may be treated with acids or acid salts, if necessary in ther presence of protective colloids, before printing with the paste containing the metallic compound, and then the addition of acids or acid salts ma be dispensed with or the quantity thereo reduced accordingly.

lhe pastes may also contain, in addition to the metallic compounds, the salts nec'ess sary for their double decomposition into insoluble loading agents such as phosphates, acid reacting substances and protective colloids being present if necessary.

Phosphorlc acid can also be added to the printing paste for such precipitation instead of these salts, serving firstly to acidify the paste and secondly to decompose the me tallic compounds on the silk. Printing pastes can also be used which contain the further substances used for loading, such as sodium silicate, in addition to the metallic compound and phosphates. The fabric first loaded parts and leave the unprinted parts dye-stuffs.

printed with a paste containing the metallic compound may also be subsequently printed with a further paste containing the salts such as phosphates, required for precipitation.

Further treatment of the fabric printed with a paste containing the metallic compound, in baths which contain the othersalts such as phosphates neccessary to complete the loading, can also be eliminated, if the fabric to be loaded is passed through baths containing phosphates or phosphoric acid, or mixtures of the same, before printing with the paste containing the metallic compound. 65

The fabrics printed and supplied with all the substances necessary for loading, are preferably dried in the air or in a heated cylinder; any excess paste or loading agent which has not entered into the reaction is 0 then removed from the textile material obtained, preferably by careful washing.

Novel and very interesting technical effects are produced by printing the silk with loading pastes by the present invention. It is possible by this process to load the fabric on one side, if the paste or pastes are applied on one side only e. g. by means of a sizing bar, or a roller. Designs can also be produced on the fabric, by printing patterns with the paste 80 by for example, engraved rollers. If the silk thus loaded is then dyed with certain mordant dyes, variegated color effects will be produced as these dyes are only absorbed by the untouched, which can then be dyed with other It is also possible to produce polytone effects, as the dyes employed produce deeper shades on the loaded areas than on the unloaded parts. c All these various loading effects may also impart a crepe character to the fabric, according to the composition of the loading material, as, owing to the chemical reaction between the fibres of the fabric and the metallic compounds, the loaded parts alter the surface of the textile material.

A loading paste adapted to be used for the present invention which has been found to be particularly suitable, may contain for excontains for example, s'tannic chloride, gum

and acid or an acid salt and the second paste,

, which is applied to the fabric over the first paste contains a thickener, monoor di-sodium phosphate, if necessary with addition of sodium silicate.

Good results are obtained by treating a fabric, before printing, with acids, abid salts orthe like with or without protective colloids, continuously squeezing out and passing through a sizing machine so as to coat it with a paste of senegal gum and stannic chloride solution. The material is then dried and treated with a solution of mono-sodium dihydrogen phosphate, squeezed out and thoroughly washed. Subsequent treatment with sodium silicatemay be employed as desired.

' The most varied loading effects can be produced owing to the various methods of working and compositions of the pastes.

The process described is very economical to work, and as mentioned above allows of v one-sided loading of the fabric, which has hitherto been im ossible with the usual load-.

ing processes. nter alia, it allows of printing a silk fabric with a pattern on one side, the back having been previously reserved; with a thickener, so that the loading printing paste cannot penetrate through the fabric and the chemical reaction necessary for the loading only takes place on one side of the fabric.

1 kg. of gum arabic is dissolved in one litre of liquid mono-chloracetic acid, and 300 v cc. of stannic chloride solution (Sp. Gr. 1.60)

- a 15% solution of mono-sodium di-hydrogen are added to this thickener, producing a paste similar to an emulsion. This paste is applied on one or both sides of the run of fabric by means of a roller or sizing bar, dried and the printed fabric is then passed through phosphate. The fabric is washed with warm iquid and treated with a solution of sodium silicate of 2 B. at 50 C. for a quarter of an hour. I

' The invention also includes the novel printing pastes adapted to be used in the fdre- --going process. i 00 I'claim: 1. A method for loading silk containing fabrics with metal com ounds which comprisesprinting the fabric with a paste containing a water soluble heavy metal compound usual for loading silk admixed with thickeners; and washing the printed fabric with a solution of a fixing and precipitating agent for the heavy metal compound of the paste. v

2. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed in presence of acid reacting compounds.

3. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed in presence of organic acids.

4. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed in presence of acid reacting compounds and protective colloids.

5. A method for loadirig'silk containing fabricswith metallic compounds according to claim 1 in which the fabric is printed in presence of acid reacting compounds and protective colloids.

6. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed with a paste containing acidreacting compounds and a heav metal compound, which enables the formation of the loading material on the fabric admixed with thickeners.

7 A method for loading silk containing fabrics with metallic'compounds according to claim 1 in which the fabric is printed with a paste containing acid reacting compounds and a heavy metal compound which enables the formation of the loading material on the fabric, admixed with thickeners, and protective colloids. N

8. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed with' a paste containing solutions of organic acids and a heavy metal compound which enables the formation of the loading material on the fabric admixed with thickeners and protective colloids 9. A method for loading silk containing fabrics with metallic compounds according to claim 1 in which the fabric is printed with a paste containing a solution of an organic acid, tin tetrachloride solution and a protective colloid thickening the paste.

10. A method for loading silk containing fabrics with nietallic'compounds which comprises printing the fabric with a paste containing acid reacting compounds and a water soluble heavy metal compound which enables the formation of the loading material on the fabric, admixed with thickeners, printing the printed fabric with a paste containing thickeners and the fixing and precipitating agents for the heavy metal compounds and washing the thus prepared fabric.

11. A method for loading silk containing fabrics with metallic compounds which comprises printing the fabric with a paste containing a solution of an organic acid, a solution of tin tetrachloride, protective colloids as thickeners, printing the printed fabric with a paste containing thickeners and monosodium phosphate and washing the thus prepared fabric.

12. A method for loading silk containing fabrics with metallic compounds which comprises printing the fabric with a paste containing a solution of an organic acid, a solution of tin tetrachloride, protective colloids as thickeners and mono-sodium phosphate and washing the printed fabric.

13. A printing paste for loading silk containing fabrics, containing thickening agents and heavy metal compounds which enable the formation of the loading material on the fabric.

14. A printing paste for loading silk containing fabrics, containing thickening agents, acid reacting compounds andv heavy metal compounds which enable the formation of the loading material on the fabric.

15. A printing paste for loading silk containing fabrics, containing thickening agents, organic acids and heavy metal compounds which enable the formation of the loading material on the fabric.

16. A printing paste for loading silk containing fabrics, containing thickening agents, solutions of organic acids, protective colloids and heavy metal compounds which enable the formation of the loading material on the fabric.

17. A printing paste for loading silk containing fabrics, containing thickening protective colloids, solutions of organic acids and heavy metal compounds which enable the formation of the loading material on the fabric.

18. A printing paste for loading silk containing fabrics containing thickening protective colloids, solutions or organic acids and tin tetrachloride solution.

19. A printing paste for loading silk containing fabrics containing thickening agents, protective colloids, acid reacting compounds, heavy metal compounds which enable the formation of the loading material on the fabric,

and fixing agents for heavy metal compounds.

20. A printing paste for loading silk containing fabrics containing thickening agents, protective colloids, solutions of organic acids, tin tetrachloride solution and mono-sodium phosphate.

In testimony whereof I afiix my signature.

RENE CLAVEL. 

